1998 Oldsmobile 88 Owner's Manual - Page 267

When It's Time f c w Tires J ~~~~ The tire has a bump, bulge or split. ~. . 4 wav to tell when it's One time for new tires is to check the treadwear indicators, which will appear when your tires have only 1/16 inch (1.6 mm) or less of tread remaining. The tire has a puncture, cut or other damage that well because of the size or location can't be repaired of the damage. Buying New Tires To find out what kind and of tires you need, look size at the Tire-Loading Information label. The tires installed on your vehicle when new had it was a Tire Performance Criteria Specification (TPC Spec) number on each tire's sidewall. When you get new tires, TPC Spec number. That way get ones with that same your vehicle will continue to have tires that are designed to give proper endurance, handling, speed rating, traction, ride and other things during normal service If on your vehicle. your tires have an all-season tread design, the TPC number will be followed "MS" by an (for mud and snow). If you ever replace your tires with those not having a TPC Spec number, make sure they are the same size, load range, speed rating and construction type (bias, bias-belted or radial) as your original tires. if You need a new tire any of the following statements are true: You can see the indicators at three or more places around thetire. You can see cord or fabric showing through the tire's rubber. The tread or sidewallis cracked, cut or snagged deep enough to show cord or fabric. 0 6-38